US PATENT SUBCLASS 172 / 139
.~.~ Plow and colter

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


172 /   HD   EARTH WORKING

133  DF  DIVERSE TOOLS {29}
138  DF  .~ With interconnected vertical adjustment {1}
139.~.~ Plow and colter

DEFINITION

Classification: 172/139

(under subclass 138) Apparatus in which the diverse earth working elements comprise a moldboard-type tool for turning a furrow slice and a cutting knife to cut a vertical slit in the earth in advance of the moldboard-type tool.

SEE OR SEARCH THIS CLASS, SUBCLASS:

144, for the combination of a colter, jointer and plow.

165+, for diverse tools one of which is a colter.